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	PRODUCT DATA of AISI 304

Material	AISI 304
Product Datasheet	AK steel 304_304L_Data_Sheet
General Information	General purpose austenitic grade for enhanced corrosion resistance
Effects of Space environment	The natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials.
Chemical Composition	8 to 12% Ni, 18 to 20% Cr, 2% Mn max, 1% Si max, 0.15% C max, Rem. Fe
Name of Manufacturer	many suppliers

	EXPERIENCE IN PRACTICE

Development Status	Commercial Product
Cost Range	Low
Lot Reproducibility	Good
Equivalent Designations	A2; A2-50; A2-70; A2-80
Space Experience	Good

	PHYSICAL PROPERTIES

Crystal Structure	Face centered cubic (fcc)
Specific Gravity	7.95
Magnetic Properties	Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

193 to 200 GPa

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status	No specific corrosion protection required
Stress Corrosion Status	High Resistance to SCC: Table 1 Remark: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data
EMF vs SCE	-0.1 V Remark: Measured in 3.5% NaCl solution Data Quality: Design Data
Bimetallic Corrosion	Can be connected without any restriction to: Cr, Au, Pt, C, Rh, Ag, Gun-metal, P-bronzes, Sn-bronzes, Ti+alloys Can be connected in a non-controlled environment to the above and Cd, Cu, Brasses, Ni, monel, inconel, N-Mo alloys, 400 series stainless steel Can be connected in a clean room environment to above and Al-Cu alloys, Cu-Ni alloys, Al-bronzes, Si-bronzes Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 Table 5.1 Data Quality: Design Data

	FLUID SYSTEMS COMPATIBILITY

Gaseous Oxygen (GOX)	Meets the mechanical impact requirements. No batch test required.
Liquid Oxygen (LOX)	Meets the mechanical impact requirements. No batch test required.
Nitrogen Tetroxide (N2O4)	SCC susceptibility is low and no fluid decomposition
Hydrazine (HDZE)	SCC susceptibility is low and no fluid decomposition